I couldn't wait to get that "R" in my license and I think my certification was only delayed by the minimum number of months required. I did not magically become a better appraiser unless that might mean taking the certification seriously and spending enormous amounts of time reading, taking classes and trying to put out better reports. I felt a responsibility to do the work of a certified appraiser even if I probably wasn't ready.
I think for the most part the only motivation to go from licensed to certified was the $1,000,000 limit on transaction value. Appraisers who work in areas where that type of transaction is rare were probably content to stay at the licensed level. My brother has the same problem as you Brad. He's been a licensed appraiser for 18 years and when he tried to upgrade a few years ago was told that some of his basic courses were correspondence and didn't quality. He would have had to taken almost 90 hours of bonehead classes after 15 years of practice.
On state and federal paper your qualifications consist of taking some basic education, passing a trainee test and appraising non-complex property under supervision. On paper I have completed the additional experience, course work and state examinations needed to certify that I can appraise any residential property without regard to complexity or transaction value.
Yet look at the real life difference between you and I. It's just too weird. How did it get this way?